51545515505 has 16 divisors (see below), whose sum is σ = 67491042048. Its totient is φ = 37480272000.

The previous prime is 51545515451. The next prime is 51545515531. The reversal of 51545515505 is 50551554515.

It is a happy number.

It is not a de Polignac number, because 51545515505 - 2¹⁴ = 51545499121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198125 + ... + 377285.

It is an arithmetic number, because the mean of its divisors is an integer number (4218190128).

Almost surely, 2^51545515505 is an apocalyptic number.

51545515505 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51545515505 is a deficient number, since it is larger than the sum of its proper divisors (15945526543).

51545515505 is a wasteful number, since it uses less digits than its factorization.

51545515505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184408.

The product of its (nonzero) digits is 312500, while the sum is 41.

The spelling of 51545515505 in words is "fifty-one billion, five hundred forty-five million, five hundred fifteen thousand, five hundred five".